Gradle buildConfigField BuildConfig cannot resolve symbol

Question

I am using Gradle to build my Android application. I am trying to use some flags based on the build type (release or debug).

My Gradle file looks like this:

android {
    buildTypes {
        debug {
            buildConfigField 'boolean', 'PREPROD', 'true'
            buildConfigField 'boolean', 'STAGING', 'false'
        }

        release {
            buildConfigField 'boolean', 'PREPROD', 'false'
            buildConfigField 'boolean', 'STAGING', 'false'
        }
    }
}

And if I try to call BuildConfig.PREPROD or BuildConfig.STAGING I get a "Cannot resolve symbol" error. The Gradle sync was successful, so I don't know if I forgot some steps in order to be able to use this feature?

The generated BuildConfig.java file is the following (in build/source/buildConfig/debug/com.example.myapp ):

package com.example.myapp;

public final class BuildConfig {
  public static final boolean DEBUG = Boolean.parseBoolean("true");
  public static final String PACKAGE_NAME = "com.example.myapp";
  public static final String BUILD_TYPE = "debug";
  public static final String FLAVOR = "";
  public static final int VERSION_CODE = 400;
  public static final String VERSION_NAME = "";
}

Answer 1

Make sure your file is importing the right BuildConfig class. Sometimes if you have other project libraries or modules, it may import the wrong buildConfig. Make sure your import it's like this com.project.app.BuildConfig . I was Having the same issue and the problem was this, Hope it can help somebody.

Answer 2

I was getting the same bug. Try to click on synchronize , on the right side of save . Do that after gradle sync .

Answer 3

Changes in gradle build files don't refresh the generation of the BuildConfig class, even if you click the yellow "sync now" bar at the top. A full clean will force generating this file.

In Android Studio: Build -> Clean Project

Answer 4

Happened to me because I did not declared a String field properly.

I forgot the escaping characters. Changing from :

buildConfigField "String", "FOO", "foo"

to

buildConfigField "String", "FOO", "\"foo\""

solved the problem.

Answer 5

In my case, in Android Studio:

1. Build -> Clean Project;

2. File -> Invalidate Caches / Restart...

3. Build -> Rebuild Project

Answer 6

我也遇到了同样的情况，在项目根目录中运行时修复：

./gradlew assembleDebug

Answer 7

You have to choose the desired build variant first to be able to access its buildConfigField

Answer 8

Make sure you add your parameter also to the defaultConfig. You are probably running the default buildVarient while your parameter is defined in a speciffic buildVariant.

in the build gradle file use this:

 defaultConfig { buildConfigField('String' , 'myParameter', 'someValue') }

Then, in the code use this:

 String myParam= BuildConfig.myParameter;

Hope this helps, MA :)

Answer 9

if this type of problem happens just clean and rebuild you project.

thanks.

Answer 10

Add below in build.gradle(Module:App) and Rebuild Project

android {
    buildFeatures {
        buildConfig = true
    }
}

Answer 11

I tried everything here and nothing worked for me. I initially had an issue that one of the methods of BuildConfig that I was referring to wasn't being detected, so I tried some of the solutions here. That only broke my project even more (or so I thought). I tried changing my build type and ended up having the problem the OP mentioned (which was a problem I did not have. I came here looking for solution to another problem and ended up creating the OPs problem for myself facepalm ).

So the solution that fixed things for me was, just go to

Build > Make Module 'app' .

And regardless of how many red mark indications I had, it just fixed everything for me. I wasn't even able to import the BuildConfig of my project after I broke it by trying the solutions here, to a problem I did not have (I'm dumb yea, idk what I'm doing). I think doing a clean build broke things further. But this solved everything for me.

Source: https://tinaciousdesign.com/blog/buildconfig-debug-always-returns-false-android/

TLDR: BuildConfig is a generated class in your project. If Android Studio can't find it, it'll prompt you to import it. Don't import it or you'll get the lint warning. Run the project as usual, ignoring the red. Your problem should be solved

Answer 12

In Android Studio, - click Build then Clean Project - After cleaning click Rebuild Project. - When done, close your project. - Open your project again and run it, the error should not appear again, it has cleared.

Answer 13

This same problem has been driving me nuts for over a week. In my case, it was a simple import missing. I looked for it but somehow nowhere in the docs I could find does it mention that you need to import the BuildConfig class anywhere! And yet, it's logical. I went on believing it might be automatic. Well, it ISN'T.

So try either:

• click once on the BuildConfig. part of code that causes the error. A help message should appear in a blue bubble saying something like: " ? uk.co.package.app.BuildConfig? Alt + ENTER " Click on it and Android studio automatically adds the missing import. or
• add import uk.co.package.app.BuildConfig; somewhere in the list of your imports.

re-build... it works! well, it did for me anyway.

Hope that helps another gradle android newbie like me!

Answer 14

In my case, the problem was that I had just renamed a module of my project, but that module's name references weren't automatically updated on the AndroidManifest.xml .

Manually renaming those and rebuilding the project solved the issue.

Answer 15

Search for occurrences of BuildConfig. I had a rogue import of non-existant BuildConfig and the compiler instead of catching that pointed at a random line of code somewhere else!

Answer 16

Use this for Android X

import androidx.multidex.BuildConfig;

it's work for me.

Answer 17

Rebuild your module by right clicking on your module and select the Rebuild Module 'module name'

or use short key : Ctrl + Shift + F9

Answer 18

If Build config is not getting resolved in build Gradle file use the below code and sync it will work as expected

android{
buildFeatures{
    buildConfig = true
}}

Answer 19

My package wasn't up to date in my manifest. I checked the file AndroidManifest.xml and corrected the name of my package. This is how i solved this problem.

Answer 20

My 2 cents:

I had a correct import xxx.BuildConfig , AS would point to that line and to those lines where I had BuildConfig.SOME_VARIABLE , so I removed import line, rebuilt it, got an error saying that BuildConfig is unrecognised reference blah blah and after that I imported it and rebuilt it again.

Answer 21

I encountered same error during build(debugging) the old project in Android studio. When i investigated error i found that BuildConfig class was defined in 2 files. 1st was in BuildConfig.java and 2nd was in BuildConfig2.java.

I removed the one of file and i worked correctly.

Answer 22

In my case, I did a stupid mistake by COPYING AND PASTING THE SAME VARIANT. I just renamed the other variant and it worked.

Answer 23

Possible solution: If you're using the Android X billing library , perhaps by adding the following line in your build.gradle file:

implementation 'com.android.billingclient:billing:2.2.0'

Be aware that the Android billing library ALSO includes its own BuildConfig class which can confuse Android Studio's code editor. If this happens, it may auto-add the following import statement to one of your classes:

import com.android.billingclient.BuildConfig;

That's not the one you want to use, right? The one you want to be using (if you were doing a debug build) might be here:

./build/generated/source/buildConfig/debug/com/example/myapp/BuildConfig.java

So to fix, remove that import statement line, and rebuild to see if it can resolve to the right BuildConfig.java . If it can't, you may need to explicitly name it via an import com.example.myapp.BuildConfig.java to make it super clear you want the version of this file from your package and not any other.

Hope this helps!

Answer 24

In my case, the problem comes from

import com.android.volley.BuildConfig;

Make sure you have import the right BuildConfig from your package not from volley .

Answer 25

Check once your file is importing the correct BuildConfig class. If it is correct, then clean or File->InvalidateCaches and Restart.

Answer 26

在我的情况下，它发生在我向我的包中添加了一个额外的级别/文件夹之后，将我的 com.xxx.BuildConfig 更改为 com.xxx.mynewfoldername.BuildConfig 然后工作正常

Answer 27

Make sure that your package name matches your app id in Build.Gradle file

Just Change it & Sync, it is going to do the necessary import for you.

Good luck

Answer 28

1. Build -> Clean Project;
2. File -> Invalidate Caches / Restart
3. Build -> Rebuild Project
4. Sync Gradle Project with Project Files

This one worked for me.

Answer 29

I would like to add another solution for this issue. I've tried every answer on this post but nobody mentioned to reboot their machine right after you updated your system variables. Works like a charm!